Revert of Fix memory leak caused by field type in descriptor array.

test/cctest/test-migrations.cc

Index: test/cctest/test-migrations.cc
diff --git a/test/cctest/test-migrations.cc b/test/cctest/test-migrations.cc
index c7aaf29d6643e420254aeefa6d4df871ed6ca99e..9eb367639a647da1592873dc6ea569cf4c831948 100644
--- a/test/cctest/test-migrations.cc
+++ b/test/cctest/test-migrations.cc
@@ -233,14 +233,12 @@
                       representations_[descriptor])) {
       return false;
     }
+    Object* expected_value = *values_[descriptor];
     Object* value = descriptors->GetValue(descriptor);
-    Object* expected_value = *values_[descriptor];
     switch (type) {
       case DATA:
-      case ACCESSOR: {
-        HeapType* type = descriptors->GetFieldType(descriptor);
-        return HeapType::cast(expected_value)->Equals(type);
-      }
+      case ACCESSOR:
+        return HeapType::cast(expected_value)->Equals(HeapType::cast(value));
 
       case DATA_CONSTANT:
         return value == expected_value;